Pentalead tris(vanadate) iodide, a defect vanadinite-type compound
Abstract
<h2>Acta Crystallographica Section C</h2><h3>Crystal Structure Communications</h3><h3>0108-2701</h3> <h2>inorganic compounds</h2> Volume 55 Part 3 Pages 271-273 March 1999 <h2>Pentalead tris(vanadate) iodide, a defect vanadinite-type compound</h2> F. Audubert, J.-M. Savariault and J.-L. Lacout Pb 9.85 (VO 4 ) 6 I 1.7 belongs to the vanadinite family and is stoichiometrically deficient in lead iodide. INORGANIC COMPOUNDS 271 Acta Cryst. (1999). C55, 271-273 Pentalead tris(vanadate) iodide, a defect vanadinite-type compound FABIENNE AUDUBERT,a JEAN-MICHEL SAVARIAULTb AND JEAN-Lotns LACOUTc servation; a lack of Pb and I is found, with only 98.2 (8)% of Pbl in site 4f, 49.3 (4)% of Pb2 in site 12i (corresponding to 98.7% if localized in site 6h) and 14.2(4)% of I in site 12i (85.1% if localized in site 2b). The resulting formula is Pb9.85(VO4)611.7. A view of the lattice (Fig. 1) shows that the arrangement encountered is that generally observed in apatites. aLaboratoire d'Etudes des Matrices de Confinement-CEA, Service d'Etudes Procgd~s, CEN Cadarache, 13108 Saint Paul lez Durance, France, b Centre d'Elaboration de Mat~riaux et d'Etudes Structurales-CNRS, 29 rue Jeanne Marvig, BP 4347, 31055 Toulouse CEDEX, France, and CLaboratoire d'Etudes Physico-Chimiques des Phosphates, 38 rue des 36 Ponts, 31400 Toulouse, France. E-mail: savariau@ cemes.fr (Received 14 January 1998; accepted